Combined friction and spur gearing for traction-elevators.



A. SUNDH.

EON AND SPUR GEARING FOR TRACTION ELEVATORS.

COMBINED PM APPLICATION FILED JULY 6, 1907.

Patented Feb. 3, 1914.

NESSE W QT 62/4,

niss

COMBINEB FRICTION AND To all whom it may c'oncem Be it known that 1, Answer SUNDH, a citizen of the United States, residing at Yonkers, in the county of iVestchester and State of New York, and useful Improvement in Combined Friction and Spur Gearing for Traction-Elevators, of which the following is a specification.

My invention relates to friction drive ele-- fipecification of Letters Patent.

have invented a new.

aria err-on CORPORATION OF NEW JERSEY.

SPUR GEARINGTOR TRACTION-ELEVATORS.

Patented Feb. 53,3914.

Application filed my 6, 1907. Serial No. 382,465.

'ried by the motor shaft with a force substant ally equal to the combined weight of the elevator car C and the counterweight 5.

The modified driving means in Fig. 3.

while the same in rinciple as that heretofore described, diiiers somewhat in construction. In this modification the friction roller carried by the motor shaft is made in a single piece andis provided with an integral raised portion or collar 18 which 'iits .es'siczuor. 'ro orrs nnnvn'ron conrairr,

upwardly against the driving element carvator apparatus and has for its object to provide efficient noiseless and positive driving gearing for transmitting motion from a motor to a friction drive or traction elevator. In the accompanying sheet of drawing Figure 1 illustrates in front elevation an elevator provided with the improved friction drive apparatus embodied in my invention. Fig. 2 is a side view in part section of the driving apparatus. Fig. 3 is a sectional view of a modification of my invention.

Similar reference characters denote similar parts throughout the yarious figures.- M designates a hoisting motor secured to 25 the bed 17 and adapted to drive an annular hoisting sheave 6 grooved on its outer periphery.;'1his grooved hoisting sheave lies in a bight of the cable 1 one end of which passes up over an overhead sheave 4 and connected to an elevator car G, and. the other end of which leads up over a similar sheave 3 and is connected to a counterweight 5. Both the sheaves 3 and i are mounted in suitable bearings secured to the overhead beams 2. Directly beneath and in close proximity to the annular driving sheave 6 are two grooved rollers 14. and 14 loosely mounted upon shafts 16 and 16 and carried by stationary bearings 15 and 15 respectively which are secured to the bed 17. The inner periphery of the driving'sheave 6 is turned smooth so as to form two friction surfaces 9 and 9 between which is formed an internal spur gear 12. A driving. element comprising a spur gear 11 is located midway between two similar friction rollers 10 and 10 which are securel riveted together by rivets Band the who e is carried by the motor shaft '4' and rigidly scoured thereto by means of a key 8. This driving element engages and co-acts with the inner periphery of the driving sheave 6. It will be seen by an inspection of Fig. 1

that the annular driving sheave 6 is pulled loosely in a corresponding circular recess-19 in the inner periphery of the driving sheave 6f theob ect of which is to prevent any relative longitudinal movement between the roller 10'. and the driving sheave 6' A. spur gear 11 is secured to the friction roller 10 by rivets 13' and cooperates with an internal gear 12 which is integrahw'ith the driving sheave 6 andlocated at one end as shown on the drawing.

Where the driving sheave is very la'r e,. n order to facilitate the construction of ee internal gear, Isometimes make this gear separately iii-sections and secure them to thedrivingsheave afterward a recess being cast or machined in the driving sheave beforehand to receive them. This method of construction is especially adapted to theorrangement shown in Fig. 2 where the ear is centrally located in the inner perip 'ery of the driving sheave 6.

It has been frequently demonstrated in actual practice that spur gearing when used alone as a means for driving a elevator produces a vibrationwhich is very disagree able to the passengers carried in the car, at the same time the noise made by gears in mesh is always objectionable. 0n the other hand friction driving means when used alone is generally unsatisfactory. for the reason that it is almost impossible to prevent slipping with subsequent loss of power and undue wear on the friction surfaces.

It should be particularly noted that by reason of the grooved rollers it, is the ring 100 sheave 6 is supported independently/of the car and counterweight acting-on the cables l. Although I have shown the cylindrical. surface of the rollers let, i l" grooved so as p to engage the cables 1, such rollers may have 195 only surfaces which engage corresponding surfaces on the ring 6 and thus remain ontirely out of contact with the cables. However, I prefer the construction shown, but in any event the rollers 14 and 14" not only no inionzi engagement with the XGHQF 1G Wi':"h

it 5 10mm support the ring sheave 5 in. the position shown to prevent vertical vibration, him-1115a Lo support such ring sheave to prevent icngitudimi movement; 02' vibration thereof.

1011 of power nw 'e efiici nt, in that var riations of load. can only produce a WP;

iimited de ree of bodil mm emem nf'a'zh ring sheave 6. Howevezy she cal and couni'zerveight acting upwardly on ihe leads of the cable 1 extending upwardly from the [fixing sheave maintain the Miter in friczforce proportional to the had. also be noted that since the rail a1 1.0 m the ring 6 at its inner geriphm-y ihem will ban larger area of frictional Contact fihan if such driving roller were connected in the ring sheave 6 at its outer peziphfiry.

As; the friction surfaces of the mike; and the ring 6 are cylindrical SiZZfiWGE- JMH ailei with their axes of rqtation and friciimi sm'facas and the spur gears-Jam e ti mine pitch if'iiameter, it is apparent t friction surfaces while in centac;

'gii'oparly int-ermesned, 211161 2115- as the gears rotate there need; 1w siippmg;

oeweeii the friction surfaces.

By the use Of my invention 1n Lichen? ch-wing apparatus, particularly in tmctiu elevators, the driving or trmisn'iissim power may be accomphsshed imstiy by the hiiciion :r013.=efs, the! gears 9.0 ng abafeuy device to prevent slipping between file p 1 in :fri :tionai engagement with each at 01 under mime. condifilons, for instance w the load is gram, power may be transmifiiiici Ln the 10nd positively by guts, assisting in such tTiLDISF Dion and mmiin'i 11g 01" PIQVQ} i. noisay due $0 vibration or 2i lash. Obviow y L-imse skilled in make various,changes in the details H mngement 01'' parts Without Ciagnrti: the ,spirit and scope of my inventi.0n, m d l Cl sire therefore not to be limited, i;0 ;i1e PI'GQLQG const 'uctiorz herein discioseiL W'imt I claim new and fie ire to have prom-061 by Letters Patent of the United bum Ll in frictional driving apparatus, ii (a colnbii'iatimi Wizh a friction. driving; her, of an unnuius in fijOfiiOfilfii or with a: driving g: ginnfor )pm: frictiouai and 111021705 L 7 driving ln' nuimf uul' said mini! m and homing the agcment with said.

sauna zncmbirix "0 prevent siippirw bcwacn 5111i} Mir, mi 1 ring; shezwa, a frici i nevted 11; the shaft miiurs 301i ii-lave V fri said driving roller in mi; with This is of imporfnnce as it renders ike trans- 'ducing to a min to 0 in a pas the ririin 2 "ran motel, an anni'z i mam" k :1 i mm ang,

ism am he drl'vui 5: The comb:

01" miles:

1110130" v a the is; mar, 2m shame prevent s1 j and saw combination with a, mots n 'drivii cummsized in; tha S3311- a positive driving surro m1 and U1 means for said mi; with MS pwupi d $0 the, S831 qniz'cti to drive i.

a an driving; CGIZUZ. her and ring s7 My member internally can 111g and meang the 1: pher of ,5 1

said membeir a fill with a 1010 mi {aha mom? ahzmft, 2 unwinding said. eie' 1.1m K

3511mm; tiierewiiuh, r; g be periphew .We iy spar-(li ing; netween the mun;

imie'nt,

& meta?? a i to i'a tab? a spur @9211 00112160? t" mcrtm: shaft an. aim

he said rah 1 1 1 SEUCL spar gemem; "$71k.

inter 113141103 Si 2: m0"

i pmer sin .iiaiieijoi", 1'. til 12 9 :iriven shaman nosaoce and a driven element, means for transmitting motion from the driving elementto the driven element consisting of the combination of frictional and spur gears having exactly the same pitch diameter, and means automatically to maintain a driving frictional engagement of the friction surfaces.

11. The combination of adriving elementand a driven element, means for transmit ting motion from the riving element to the driven element consisting of the combination of friction and spur gears, the friction gear having exactly the same pitch line as the spur gear, the frictional driving surface being parallel to the axis of rotation, and means automatically to maintain driving friction between the friction gears.

12. The combination of a driving element and a driven element, means for transmitting motion from the driving element to the driven clement, comprising a driving pinion having a friction surface and a spur gear having the same pitch line as said friction surface, a driven member having a frictional surface and a spur gear connected thereto in engagement and contact with said pinion, and means to obtain a driving friction between the said friction surfaces whereby the power will be transmitted through friction surfaces and the spur gears and form a means to prevent slipping at the friction surfaces. I

13. In combination, a driving element and adriven element, means for transmitting motion from the driving element to the driven element consisting of a plurality of gears, each gear having Tooth a frictional surface and spur gears of exactly the same pitch diameter, means to support the plu rality of gears, and means to automatically keep them in frictional driving contact in spite of the Wear.

1a. The combination of a driving element, a driven element, means for transmitting motion from the driving element to the driven element comprising friction gears, means for automatically holding said gears in frictional running contact, and intermeshing spur gears rigidly connected with the friction gears, means to support each of said gears, the pitch line of each of said spur gears being the same'as that of its supporting friction gear.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnesses.

' aueus'r SUNDH.

- Witnesses:

CHAS. M. Nissan, Janus G. BETHILL. 

